Apparatus for constructing picker rolls



Jan. 8, 1946. SCHULTZE APPARATUS FOR CONSTRUCTING PICKER ROLLS Filed -April 29, 1942 7 Sheets-Sheet 1 INVENTOR Rqa 50/104725" Q BY W 5% ATTORN Jan 8, 1946. P. SCHULTZ E APPARATUS FOR CONSTRUCTING PICKER ROLLS Filed April 29, 1942 7 Sheets-Sheet 2 INVENTOR Pew; 62/11/4725 TTOR EY Jan. 8, 1946. 'P. SCHULTZE APPARATUS FOR CONSTRUCTING PICKER ROLLS '7 Sheets-Sheet 3 Filed April 29, 19 42 INVENTOR Z944 "15 Z w WW m 4 5 W 6 al 9 L an o w m J m w b l AU m ATTORNEY Jan. 8, 1946. sc q ZE -APPARATUS FOR CONSTRUCTING rIcKER ROLLS Filed r l; 29, 1942 'zrs'heets-sheetfiA INVENTOR P404 5c Ill/L 7'25 Z MM ATT Jgn. a, 1946. R CHULTZE 2,392,777

APPARATUS FOR CONSTRUCTING PICKER ROLLS Filed April 29, 1942 7 Sheets-Sheet 5 ATTOR Jan 8, 1946. p sc u -rzg 2,3925777 APPARATUS FOR CONSTRUCTING PICKER ROLLS Filed April 29, 1942 7 Sheets-Sheet 6 No 09. n m

INV E NTOR Z704 Sc/70 72E Jan. 8,1946. P. SCHULTZE APPARATUS FOR CONSTRUCTING PICKER ROLLS 7 Sheets-Sheet 7 Filed April 29, 1942 Patented Jan. 8, 1946 APPARATUS FOR CONSTRUCTING PICKER ROLLS Paul Schultze, Danbury, Conn., assignor to Doran Brothers, Incorporated, Danbury, Conn, a corporation of Connecticut Application April 29, 1942, Serial No. 441,045

25 Claims.

This invention relates to an apparatus for the preparation of certain parts of high speed picker roll elements and for the assembly thereto of other parts, thus to complete the picker roll elements, the latter being particularly for use as picker rolls or picker cylinders employed in apparatus for blowing or separating fur for fur felt manufacture. One of the objects of this invention is to provide a dependable and practical apparatus for rapidly and efliciently preparing the hollow cylindrical support for the reception of the picker pins and for assembling the latter to the support, 'in a manner to make it possible to provide and maintain dynamic balance. Another object is to provide an efficient apparatus, capable of operating at high speed, for drilling appropriately distributed holes in the picker roll support for the reception of the picker pins.

Another object is to provide an eflicient and dependable apparatus that will be capable, at relatively high speed, of drilling suitably distributed holes through the relatively thin wall of a hollow cylindricalsupport and at the same time of anchoring picker pins in such holes with such substantial identity of distance of the centers of mass of the pins as will achieve dynamic bal-.-

ance. 7

Another object is to provide an apparatus of the above-mentioned character that will be of the just-mentioned character that will be thoroughly practical and dependable and which will improved and compact construction, of eflicient action, and well adapted to meet the varying conditions of hard practical use. Another object is in general to provide improved apparatus capable of highly efficient functioning in the art to which it pertains. Other objects Will be in part obvious or in part pointed out hereinafter.

Another object is to provide an apparatus for drilling holes in the desired pattern, such as in arow or rows, and to follow up the drilling of the 'holes by putting pins therein, and to make in such an apparatus suitable provision for compensating for the time difierentials at which the drilling and pin-settin operations are performed. Another object is to provide, in such an apparatus, a dependable control to insure that the operation of assembling the pins to the holes takes place properly after a suitable number of holes have been formed to correspond to the space differential between the locus of operation of the pin-assembling mechanism and the locus of operation of the drill. Another object is to. provide, in such an apparatus, a dependable control for halting the hole-forming operation at the completion of the pattern and to continue the be capable of operation with minimum supervision. Another object is to provide an apparatus of the just-mentioned character in which the controls are readily adaptable to varying requirements met with in practical use.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in the structure to be hereinafter described and the scope of the application of which willv beindicated in the following claims.

In the accompanying drawings, in which is shown one of various possible embodiments of my invention:

Figure 1 is a front elevation of the complete apparatus;

Figure 2 is a plan view thereof with certain parts omittedor broken away to show certain other parts more clearly; I I

Figure 3 is an end elevation as-seen from the left in Figure 1;

Figure 4 is a sectional view as seen along the line 4-4 of Figure 1, certain parts being broken away or omitted;

Figure 5 is a View as seen along the line -5--5 of Figure 1;

Figure 6 is a view of part of the apparatus as seen along the line 66 of Figure 5;

Figure 7 is a detached vertical sectional view as seen along the line 1-1 of Figure 6;

Figure 8 is an elevation on a larger scale showing an illustrative form of pin;

Figure 9 is an elevation one. larger scale showing another illustrative form of pin;

Figure 10 is anelevation, partly in section as seen along the line Ill-l0 of Figure 6;

Figure 11 is an elevation, partly in section, as seen along the line I l-| I of Figure 6; I

Figure 12 is a front elevation, like that 'of'Figure 1, certain parts however being broken away or omitted, showing certain relationships upon setting the apparatus to drill the first hole;

Figure 13 is a plan view .of the apparatus shown in Figure 12; I

Figure 14 is a fragmentary view as seen along the line |4l4 of Figure 12, showing certain of the parts as they are interrelatedupon d illing the first hole;

Figure 15 is a view like that of Figure 13 but shows the relationship of certain of the parts upon driving of the last pin;

Figure 16 is an end elevation or transverse section as seen along the line Iii-i6 of Figure 15.

Similar reference characters refer to similar parts throughout. the several views of the draw! ings.

As conducive to a clearer understanding of certain features of thisinvention, it might here 2,392,777 r l s The pins P preferably takea form like those be noted that, in the fur felt industry, blowing? machines are employed to effect separation from the desired fur fibres of heavier fur fibres and foreign or undesirable material, like pieces oi skin, and that in such machines there are employed picker rolls that have to be driven at high rotary speeds, speeds on the Order of 4,09,,0 R. P. M., the separating action above mentioned taking place, in coaction with other elements, as a re ults? the high releei y impa ed to t e pa ticles by t e rap dly revolting p ker rollsn such actions, the heavier or undesired particles or m eria s a ea sed t exert e i u al f rces suf e en -te discharge them tangentially away from the lighter or desired fur fibres, the latter being moved: in the desired direction by air our, re is p d ced y e. pro t g picker pi s. o th h h peed p c er re l- To achieve these actions requ res high periph eral velocitiesand I have found that where the picker 11- diameter is on the. or e of 1", a drive on. the order of 4,00,0B.,1=.'.M. islapprop i e Where the picker pins are losely set andproiect from the picker roll for about The. pins are. preferably hi metal, su h as steel, and Where p oiectin n r intedth sha ks y e m n or may hav multiple th ead o ge pit thereense as to ut he wn t read h o ced into the support.

At these high peripheral velocities and with the relatively substantial size or mass of the pins, there Should begood dynamic balance of the picker roll and such a secure anchora e of the "pins therein as to resist the centrifugal forcev A preferred and illustrative form of rotary base or picker roll element for supporting and anchoring the pins comprises a tubular or sleeveelike element indicated genera ly by he referen character 20 in Figures 1, and of the drawin s. ein el tive y th n-Wall d, ade of a terial of good tensile strength, and preferablyof a mou da le materi l such as phenolic c ndens -tion product, preferably with fibrous material such as ay rs or suitab e fabri s embedd therein and impregnated by and ound together wi h the Phenolic cond nsat on product, The

slee e eme t, referred to n the claims also as a supp rt, may av an inside diame er o %",ale o tside di met r of 31- 6.", makin a wall hic nes or singly or several of them axiall aligned, may be mount d upon a drurhelilse shaft of metal Onto whieh it snugly fits and is s eeved nd suitably secured theretq, and so mo nted may function in the above-mentioned fur blowing machines,

Such a sle ve lement, eith r shown in Figures 8 and 9, being preferably of metal, such as steel, and being dimensionedto have good points'as at 2! and good rigidity to resist the reactions of the mechanical forces exerted in the blowingmachine; thus, they may b o a th e nessen the Q dere "They have shanks 22 preferably cylindrical in form and in 'the'form of' Figure" 9 t'heshank is provided with threads 23 of relativel large pitch 7 and preferably terminating short of the stub end of the pin, thus to leave a portion 122 of the shank substantially free of threads and of a diameter on the order of the root diameterof the threads 23. V

By means later described, the sleeve 20 is drilled to provide it with holes H preferably arran ed in one or more helical rows, illustratively four helical rows, one-of which is indicated in Figure 1, at R analogous to a multiple thread A fubstantial pitch, the holes, as is alseindiea d Figure .5, xtending complete y til-mush; the Wall of h s e houl be unifo mly d ribu d. and, moreover he diameter; of the holes. H is somewha l ss than the dia et r-c the, shank 2,2 of the, pins P Wher the latter are p ain, as in g e 8 s that e fit or the hank into a hole is analogous to a force fit, and Where pins .of steel pitch threads are employed as in Figure 9, the diameter of the holes is just about equal to the root diameter of the threads 23 so that the threads have to. cut themselves a CD1? responding threaded pathway into the material O the sleeve 20, the pin undergoing rctarymoveand moreover w th their centers of mass equi di tant. from the axis of the sle vei The apparatus for ef ecting su h drill ng and assembly ompri es ee Fig. 1,). abase 25 wi h upports or less 2.5, and. upstanding fr m the bas 25 are standards 21 and 28 of which standard}! is ri idly and fixe ly secured as by the screws 30 a d standard 2.8 is detacha ly se ured t the bas as, by a threaded stud 3| PIol'QfitihQWWhWhldlt' from the standa d 28 throu h an ope -e ded slot 32 in th base 25,, thr aded stud 3 r ceivin hand-op rated cl mpin nut In sta d rd 2!- i r gid y anchoredl as y a p n 35, a relat vely heavy and stron haft 35 Whose opp s te end nt s, ahole t1 in-the standard 28 thu to, suppo t he ri h -h d d. of h haft 36s Shaft 36 r tatably and slidably su p rts. a cyl dr ca str ctu e or which the ri ht-hand pert n s in the form o a man r l 39 of a ng h appr p ia e't r eiv 'the e n the s eeve 0 a d of hich the l ft-hand portion is hreaded as at 0. t e p tion ill ha g the eon hrea s ich in num er and p tch orrespond to h number and. pitch of he ro s of the hol s H the slee e 8-, h wher th latter i to a e four ows or helixes, ortion 8 has f ur threa T T and T4.

suita le m ans r providedi or fix ng there-sition f. the slee e, r lat e to the thr ads o lem nt i S uce, i e p ie red cons uct on i t ab -m n oned ck r ol s. P e er o sle e ver ev s, 2 on o the driving and supporting m 0. 1 a t a d in e f r ha rurpose I providev the peripheral ends of the sleeves with cut-outs 29 and 29", preferably each of 180 extent and displaced from each other by 180 so that successive sleeves interfit and interlock at their adjacent ends, I prefer to utilize such stepped or cut-out ends of the sleeve for fixing its position relative to the threaded part 46 and hence, intermediate of the parts 39 and 46 I may provide an annular shoulder 4| presenting at its right-hand end, as viewed in Figure 1 a step or cut-out 'of 180 extent with which theleft-hand end of sleeve 29 interfits and thus holds the sleeve 20 against rotation relative to the mandrel 39, as is clear from Figures 1 and 2, and onto the end of mandrel 39 I may slip a collar 42 temporarily anchored as by a set screw 43 to hold the sleeve 20 against axial movement out of interlocking relation with the shoulder 4|.

' By loosening up the hand nut 33, the standard 28 may be slipped off toward the right, leaving the shaft 36 supported as a cantilever from the standard 21, whence, after loosening the collar 42, the collar and the sleeve 20 may be slipped off the mandrel 39 and right-hand end of shaft 36, to be replaced by another, by a reverse sequence of steps, it being noted that the base 25 is suitably shaped as at 44' to form a seat for the standard 28 and thereby fix the position to which it islreturned.

The mandrel 39 is preferably constructed to give the relatively thin-walled sleeve 26 substantially uniformly distributed support and for that purpose I prefer to have the outside diameter of the mandrel 39 dimensioned to snugly receive th'ereover the sleeve 20, but externally the mandrel 39 is grooved as at 39 to provide as many helical grooves 39*, as there are to be helical rows of pins, illustratively four such helical grooves corresponding also in pitch to that of the four helical rows R R R and R of the above-mentioned holes H; this construction leaves the cylindrical surface sub-divided into a similar number of helixes 39 which thus present uni:

formly distributed supports against which the internal face of the sleeve 20 engages. The structure 39-49 may be made hollow or tubular, if desired, excepting of course at those portions, such as the ends, where it is bored to a diameter to form a sliding and rotary fit relative to the fixed shaft 36.

The shaft 36 is of suflicient extent relative to the length of the structure 3940 to give a range of sliding movement sufllcient to traverse the entire length of the sleeve 20- relative to two points which, in order not to require extension of the range of such sliding movement, are preferably displaced in an axial direction as little as possible; one of these points is at the locus of operation of a drill 46 (Figure 1) and the other is at the locus of operation of the vertically movable pinforcing device which includes a plunger 45. Conveniently, drill 46 and plunger 45 are diametrically opposed (Figure 5), being thus spaced 180 from each other, and to achieve the above-mentioned preferred or minimum spacing, they are axially displaced (see Figure 1) by a distance corresponding to half a turn of the equally pitched helical grooves 39*. Both drill 46 and plunger 45, having their vertical axes intersecting the axis of the mandrel 39 Where the pins are to be positioned radially of the sleeve 20 are thus juxtaposed to a helical groove 39 in the mandrel 39, drill 46 being in advance of the plunger 45 with respect to the direction of rotary movement of the mandrel andsleeve,-that direction being as indicated by the arrow in Figure l.

Where the displacement between the drill and pin-forcing device is 180, I prefer to position the drill 46 with its driving support or chuck above the mandrel 39 and the pin-forcing plunger below the mandrel. In the relationship shown in the drawings, sleeve 29 with its helically grooved supporting mandrel 39 is at a point substantially halfway of its sliding traverse along the shaft36.

Coacting with the threaded element 49 is a block 41 having a face 41 (Figure 2) that is curved and threaded to mate with the threaded surface of the part 40, being like a segment of a nut.

Block 41 is held against movement lengthwise of the guiding shaft 36 but is mounted to be moved toward or away from threaded element 40 so as to engage or disengage its thread. Conveniently, it is supported on an arm 48 fixedto a shaft 49 that has an arm 50 fixed to its other end, shaft 49 being supported in two upstanding bosses 5| and 52 in whichit and the arms may oscillate as a unit and by which this unit is held against axial movement.

Suitable means are provided to hold the block 41 in engagement with the threaded part 40 and such means preferably comprises a spring 53 connected to arm 50 and to an arm 54 (Figures 2 and 3) secured to a shaft 55 supported in bosses 56 and 51 projecting upwardly from the base 25 like th bosses 5|-52 that support shaft 49.

Shaft 55 can swing in the bosses 56-51 but is held against axial movement by the engagement of arm 54 with the boss 56 and by the engagement of anarm 58 at its other end with the boss 51. Arms 54 and 58 extend upwardly and in parallelism (Figures 2, 3 and 4) and in their upper ends fixedlysupport the ends of a holding pawl 69 which, being conveniently in the form of a square rod, presents throughout its length, which is at least equal to the traverse stroke of the structure-39-40, a single tooth like portion for coaction with a toothed ratchet wheel 6| mounted or formed at the left-hand end of the rotary and slidable structure 39--40. Thus holding pawl 60 may coact with the ratchet wheel 6| at any point in the axial movement of the wheel 6| whose teeth are in number the same as the number of holes H desired to be provided in a single turn of the sleeve 20 or of a helical row of holes, 7 i

Spring 53 will thus be seen to bias the threaded block 41 into engagement with the threads of part 40 and to bias also the h'olding pawl 60 into 'the tension of spring 53 and in a similar way block 41 may be manually disengaged from the threaded part 40.

To the left of ratchet wheel 6|, as seen in Figures 1 and 2, the structure 39-49 is constructed as at 63, to provide abearing for the hub Meet a bell crank lever 64 having an upwardly directed arm 64 by which is pivotally carried, as by the pin 65 a paWl66 urged in any suitable way, as by its own weight, into coacting relation to the ratchet wheel 6| (see Figures 3 and 4).

The other arm 64 of the bell crank lever 64 extends rearwardly and downwardly and has se viewed in Figure 3.

cured to it one end of a rod 61 whose otherefid is rigidly secured to the arm 68 of a lever 68 whose hub 68ahas a bearing coo-axial with the bearing of hub 64 of lever 54, and this bearing is conveniently and'preferably formed in the left, hand portion of the shoulder 4| (Figures 1 and 2) of the structure 3940.

A bracket secured adjacent the rear end of thebase carries a horizontal'pin ll (Figures 2, 3 and 4) which forms a horizontal pivot for one arm 12% of a V-shaped lever 12 (see Figure 1) V at whos apex is 'mounted a roller 13 which is thereby positioned underneath the rod 51, and

pin H (as viewed in Figure '1) and given a'return stroke, once for each revolution of the cam 15 and at a suitable point in its rotation, cam fol-' lower 14" bein held in coaction with thecam 15 in any suitable way as, for example, by the weight of the lever 12 and the weight of the rod 6'! and the lever arms 64 and 68 which tend to swing downwardly or in counter-clockwise direction, as

Accordingly, upon the upward swing or stroke of lever 12 (Figure 4) roller 13, moves upwardly and,being in engagement with the-rod 61 irrespective of the position of the structure 39-40 lengthwise of the guide shaft 36, moves the latter upwardly and thus moves the pawl 66 in counterclockwise direction to rotate the ratchet wheel BI and hence the structure 39 by ,an amount equalto the distance between two teeth of the ratchet wheel 6!, the angle of movement corre sponding to the angle desired to be subtended by two successive pins in the ultimate picker roll and hence by two successive holes H to-be drilled in a row of holes in the sleeve 20, the holding pawl 60 yielding toward the right as this rotary movement commences and being in efiect cammed out of the space between two teeth but being entered threads on part 40 being as shown in Figure 1,

that step of rotary movement is accompanied'by astep of traverse of the structure 39-40 in a direction toward the right as viewed in Figure 1.

Since the drawings show the sleeve 20 and the mandrel 39 at about its halfway point of rotary and axial traverse, thus assuming that certain operations, namely, the drilling and pin-setting,'as hereinafter described, have taken place throughout about one-half of one of the helixes, the com pletion of the above-mentioned step of conjoint rotary and axialflimovement of the structure Qfl-Aflf brings arbla'nk space or portion 'of the sleeve 20 into juxtaposition to the locus of opera! tion of the drill 46 and brings analready drilled hole into alignment with the plunger45 to have a pin pressed or forced into the hole, there being a 180 arcuate extent of; drilled holes between the point of operation of the plunger 45 and the point of operation of the drill 46 because these'two.

elements happen to be spaced 180 apart as above noted. a

With the halting of the sleeve 20 in this new pos sition, the drill 46 having been held in withdrawn position during the movement as is later de-,- scn'bed, is now moved downward as seen in Figures 1. and 5 at a suitable cutting feed rate to drill a hole in the blank space of the sleeve 20, and as shown in Figure 1 the downward movement of the drill is preferably to an extent to pierce the relatively thin wall of the sleeve 20, the protruding end of the drill being accommodated in the underlying helical groove 39*, and which is "of ample width and depth for. that purpose. During the drilling operation, the wall of the-sleeve 20 is well supported against the pressure of the drill, by the helical mandrel faces 39 to either side of the helical groove 39* as seen in Figure 1, the downward pressure upon the mandrel. 39 being onposed by the upward pressure thereon exertedby the plunger 45 which, during the drilling stroke of the drill is moving upwardly asviewcd in F ure 1 to force-fit a pin into a hole in the sleeve 20. The coacting mechanisms for achieving-properly timed work and retrograde strokes of the drill 46 and the plunger 45 are described later in detail, since their construction and coactions are better understood after certain other mechanisms and their functions are described, and since it will further be appreciated that'high speed andfde pendability of operation are not achieved if, for

example, the succession of holes is drilled without assurance of properly setting a, pin in each hole; 7 Plunger45, at the conclusion of the abovedescribed rotary and axial movements of mandrel 39-740, is in lowermost position, a position better shown in Figure 7 and it is brought into that position, by mechanism aboutto be described, in order to achieve the actuation of separable throat elements which in Figures 5 and 7 are shown as comprising two members BI and 82, pivotally mounted on pins 83 and 84 carried in spaced ears formed in the upper portion of a boss 85 preferably formed integrally with the base 25 and bored or drilled as at 86 to form an accurate guide for the cylindrical plunger 45 to guide its axis preferably in a line at right angles to, and intersecting; the axis of the mandrel 39 and hence of the sleeve 29. g

The separable throat elements 8 l82 are biased toward each other and toward the line of vertical movement of the plunger '45, in any suitable way, and conveniently this may be achieved by so shapin and pivoting them that, their respective weights effect the desired bias, though it will be understood that springs may be employed if desired.

With plunger 45 in its lowermost position as in Figure 7 and being provided, in line with its axis, with a "tapered hole or recess 81 that is con formcd generally to the shape of the pointed or tapered ends 2| of the pins P (Figures 8 and 9 a pin P is 'supplied to theplunger 45 and injected into the recess 81 pointedoend first, from a supply magazine generally indicated by the reference character 89 and by coacting mechanism to insure that no pin is supplied to the plunger reversed end for-end and to insure reliable assembly of the pin to the plunger, during the hort interval is a shaft 9 I at whose upper end is secured a somewhat conically shaped hub 93, being preferably detachably secured in any suitable way as by the thumb nut 94; at the lower end of hub 93 is secured a circular plate 96 of a thickness on the order of the diameter of the pins P, and extendingabout the periphery of the rotary disk 96 is a cylindrical wall 98, parts 96 and 98 together forming a container into which a suitable quantity of pins P are placed. Brackets 9'! secure part 98 to the base 90.

At the outer periphery of the bottom or plate element 96, which rests snugly and fiatwise against the upper face of the frame plate 90 and relative to which it rotates, and within the circular or cylindrical boundary formed by the inner face of the wall element 98, I provide in the member 96 a series of apertures or recesses I which have substantially the same shape as the pins P as the latter are viewed in Figures 8 and 9 or as they are shaped in central longitudinal cross-section and hence each recess or slot I00 has a portionI00 corresponding to the shank part 22 of the pins and a tapered forward portion I00 corresponding to the tapered or pointed portions 2| of the pins, and as shown in Figure 6, the apertures or slots I00, preferably substantially equidistantly spaced are arranged in succession but with the tapered portions I00 of all of them heading in the same direction.

As thedisk plate 96 is rotated in clockwise direction in Figure 6, its underface moves relative to the frame plate 90 and itsupper face, upon which the haphazardly arranged mass of pins rests, tends to drag the pins along with it, but dueto the tilt of the structure as better appears in Figure 5, the mass of pins tends to gravitate and remain somewhat concentrated within the lower left hand portion of the container 96-98.

This gravitation, aided by the rotary movement ofthe bottom plate 96, insures the lining up of the pins tangentially and in the general region of the apex of the angle between the wall 98 and the bottom plate '96 where they are of lowest elevation, and individual pins tend to hug into that apex. Such of them as do so with their pointed ends heading clockwise (Figure 6) fall into the slots I00, one by one, as the slots are successively brought through the region of lower elevation of the magazine, resting against the frame plate 90 relative to which they are carried or moved clockwise.

' Such of the pins as are not thus trapped in a slot I00, for example, pins that have their shank ends headed in clockwise direction, cannot register with and enter a slot, but in the process of being agitated and moved'around by the slow rotation of the plate 96 eventually become turned end for end, gravitate into the above-mentioned apex, and enter or are trapped by the slots I 00, and thus start upon their controlled movement of translation about the axis of the magazine.

In the frame plate 90 is formed a straight channel IOI of a depth and width adequate to accommodate pins P, as shown in Figures and 6, and

channel IOI extends in a direction so that it partakes of the incline of the frame plate 90 and so that it underlies the rotary bottom plate 96 and later pointed out.

is tangent to the circle along which the midpoints of the slots I00 are aligned. This relationship of tangency is generally indicated in Figure 6 at A.

Accordingly, pins P which become seated in the slots I00 as the latter traverse the region substantially like that indicated at B, are transported in clockwise direction from the region B and as the slots I00 are successively :brought to the region A of tangency and hence successively brought into a position overlying and aligned with the channel IOI, the pins, no longer finding support upon the upper face of the frame plate 90, drop into the channel IOI and due to its inclination slide downwardly toward the left as viewed in Figure 5, along the channel. Should the channel IflI be filled throughout its length by pins P, the pins in the channel IOI prevent the pin in a slot I00 from dropping into the channel ml and any such pin remains in the slot I00 and has to make a 360 circuit of movement before it is again presented at the region of tangency to the channel IOI.

The number of slots I00 and the rate of drive of the slotted plate 96 are such that, even allowing for failure of pins to enter some of the slots during a; single rotation, pins are presented at the region A of tangency'at a rate greater than the rate at which the plunger 45 can assemble the pins to the sleeve 20 as the latter is given step by step rotary and traverse movements, thus to insure against gaps in any helical row of pins on the sleeve 20.

The shaft SI (Figure 5) of the magazine structure is preferably driven from an auxiliary shaft I04 rotatably supported preferably underneath the frame 25 in suitable spaced bearing bosses I05 and I 86; driving connection from shaft I04 to the magazine shaft 9| may be effected by reduction gearing such as the small bevel gear I01 on shaft I04 driving the large bevel gear I08 on a shaft I09 extending upwardly and at an incline through a bearing support I I0 secured to the base 25, whence shaft I09 and magazine shaft 9| are connected by any suitable form of flexible or universal joint indicated at II I. V V

Shaft'IM (Figure 5) is preferably driven in synchronism or timed relation with the main drive shaft 11 above mentioned, and a convenient drivnisms which coact with the above-mentioned,

separable throat elements 8I82 and with the abovedescribed magazine construction, particularlywith the action that takes place at the region A of tangency, andconveniently I actuate such mechanisms from cams H6 and III (Figures 3 and 5) mounted upon shaft I 04.

a In Figure 1, cam H6 is seen in side elevation to indicate the general character of its shape and cam II! is of the same-shape but is displaced from cam II6 by a suitable number of degrees as Coacting with these two cams are cam followers H8 and H9, conveniently in the form of vertically extending rods, 'biased into cam-following relation by any suitable means, conveniently by their own weight, and provided with any suitable means, such as apertures I20 andfIZI in the base 25 and apertures I22 and I23 in a block I24 adjacent their upper ends, for slidably supporting and guiding them.

. "Block I24 is secured to or supported from an them lever arms I45 and I46 which at erably lever arm Just about when plunger 45 and the throat elements 8I-82 reach the relationship shown in Figure '1 and described above in detail, cam II6 lifts the gate I36 upwardly away from cross slot I38 (Figures 5 and 6), thus releasing the pin theretofore held by the gate I35, cam II1 during this action leaving gate I35 in closing position and entered into the slot I31, thus to hold back the pins that are lined up in channel IOI between the gate I35 and the region A of tangency; The single pin thus released rapidly slides down along the steeply inclined channel extension I21 and becomes assembled to the recess. 81 in plunger 45 in themanner above de scribed. 1 w

The" downward stroke of drill 46 and upward stroke of plunger 45 now commence and also the gate I36 is returned to closing position and gate I35 is moved tov releasing or open position, allowing the aligned pins in channel I9I to slide downwardly by a distance equal to the length of a pin, the foremost pin and hence the moving row ofrpinsbeing stopped by closed gate I36. Thus also the channel IOI in the region A of tangency is cleared for the reception of pm. J

The channel IOI is preferably of a lengthappropriate to accommodate a suitable number of pins,-such as that suggested in Figure 6, so that gates I35 and I36 may function to release individual pins to the throat and plunger in the event that several slots I should be brought around to the region A of tangency in an empty condition.

The gates I35 and I35 have arms I35 and I36 pinned or otherwise secured to shafts MI and I42 respectively mounted in bearings formed in a bearing block I43 secured as by screws I44 to the upper face ofthe channel carrying member I21,and shafts MI and I42 have secured to their outer ends (Figure overlie and are engaged by thecam follower rods H9 and I I8 respectively. Any suitable means may be employed tobias the gates into closing position, and conveniently the weight of the parts, including the weight ofthe levermembers I45 and I46 may serve that purpose, acting also to maintain the lever arms in engagement withthe cam follower rods. Pref- I45 overlies lever arm I46, the latter being suitably apertured as at I46 to permit the free passage therethrough of cam follower rod II9 into engagement with the lever arm I45. i

The above-mentioned upward stroke of plunger 45 and, control of its return stroke is preferably achieved by a cam I41 on the main drive shaft 11 (Figures 1, 3 and 4), shaped as shown in Figure l, with the drive of shaft 11 being counterclockwise. Coacting with cam I41 is a cam follower or roller I48 rotatably supported by a pin I50 between the bifurcationsI5I andv I5I- of a lever I5I, whose left-hand end I5I as seen in Figure 1, is pivotally supported by a shaft or pin I52 carried by two spaced bosses I53 and I54 projecting downwardly from the base 25.

At the right-hand end as seen, in Figure 1, the lever parts I5I -I5I which extend to eitherside of the downwardly extending guiding boss 85 for the plunger 45 (Figure 5), have pivotally secured to them, as by pins I55 and I56, links I51 and I58 respectively which, at their lower ends, pivotally engage as bypins or trux i -ions I-GI. and 162 aplunger, carrier. I63 of another appropriate vertical extent and having a vertical bore or hole I64 therein in which is received the lower end of the plunger 45.

The above-mentioned downward stroke of the drill, taking place just about concurrentl with the upward stroke of the plunger45 is prefer ably achieved by a cam I11 on the main drive shaft 11 (Figures 1, 3, 4 and 5) shaped asisv the lower end of a bifurcated member I84, looked as by a lock nut I85, member I84 carrying apin;

I86 by which a pivotal connection is effected with an arm I81 secured to a shaft I88 rotatably' supported in horizontalbearings I90 (Figures 1 and 5) formed in the vertical drill-spindle guide frame I9I, the latter being secured as by screws I92 to: the upper end of a standard I93 which rests upon the bed or base 25 which is secured as by screws- I94.

form and supports therein non-rotatably but vertically slidable a sleeve-like spindle support I95 provided in any suitable way with suitable rotate but must partake of up and. down move'-.

ment with the spindle support I95.

At its lower end, the shaft I91. is providedwith a suitable chuck I98 to receive the drill 46 and at its upper end the shaft I91 has asplined connection (not shown) with a pulley 200 by which it is driven at a suitable drilling speed, a belt 20I extending from pulley 200 to a pulley 202 mounted on the shaft of a motor 203 secured to the upper end of the upright standard I93.

Intermediate of the bearings I98 (Figure 5) the spindle supporting frame I90 is cut away to expose the teeth formed in the spindle support I95, thus to form a rack 204 and meshing with the rack 204 are the teeth of a sectional gear 205 rigidly secured to the shaft I88 and accommodated between the spaced bearings I90.

As is better seen inFigure 1, cam I11 is'sh'aped substantially similar to the plunger controlling cam I41 and is substantially aligned with the latter so that the rise and fall of both lever arms I5I and I8I take place substantially in synchronism or unison. The upward swing of lever I8I raises the push rod I82 and through the gearing 205-204 the drill spindle and drill 46 are lowered to an extent, and at a drilling rate to cause the drill to drill a hole in the sleeve 20, the penetrating end of the drill being accommodated in a helical groove 39*;

being withdrawn, and in this connection any suitable means such as the weight of the lever I8I may be used to cause the lever faithfully to follow the cam I11 and such means as the weight of the push rod I82 and connected parts may serve to keep the push rod with the end of lever I8I and cause it faithfully to follow also the downstroke of the lever I8I. Due to the substantial synchronization of "levers I5I and-I8I, the

25 which isfformedto;

The frame I9I is sleeve-like or elongated in downward swing of the lever I8I reverses the movements, the drill plunger 45 moves: up as the drill moves down; 7

and. vice versa, the; pressure'eifects oi the two upon the sleeve ZO'andits mandrel support being substantially counterbalance 1 .With the mandrel and the sleeve ZO mtat'ed step by step and axially advanced in the directions indicated. and with the advance displacement of the locus of operation of the drill. 45 from the locus of operation of the plunger 45,. thedrill drills the holes successively and. in ad- Vance of the. operation of the: throat elements and plungergthus providing. the sleeve element 20 with the holes into which the other coacting mechanisms operate to set pins, and in the illustrative embodiment there is a 180 extent of I I55- (Figure 5) preferably giving the end face or the plunger 45 a concavity to form a seat I56" to hold the ball I65 coaxially of the plunger45, thus to bring its point of tangency with thebottom of the bore I64- in coincidencewith the spear-7r taking of a. slight amount of swing. (see. Figure I) "about their lower pivotal connections. I til-I162. as the axis of the upper pivotal connections I55-I'56 to the. lever. I51 partakes of a; relatively small arcuate motion under the control of cam I41, But the links I 51-I 58 insure, during'the upward stroke of the plunger, a nicely balanced and positive application of driving force to" the carrier I63 and hence to the plunger, and thus vertical axis of the plunger and thus insuring easeor ni'cety of rotary movement of the plunger relative to its carrier I63.

Whether or not the plun er 45 is mounted .for rotary movement, 1'- preferably provide suitable means for adjusting the extent towhich the upper end of the plunger 45 approaches the axis. of the mandrel 39 (Figure5), in order to facilitate accommodating. the apparatus to various requirements such'as changes in diameter of the'sleeve 20; different lengths of pins, and

the like, but also to insure that, for given con ditiona, the. upwardstroke' of plunger 45' is such as will bring the end faces of all of the pins,

whether the latter are threaded or not, into coincidence with the inner cylindrical surface of thesleeve 20 even though the outerv cylindrical face of the grooves 39*.

A convenient. and preferred means comprises. a screw I61. threaded into the lower end portion of. the bore I64 of the carrier I63, the end. face of the. screw I61 thus forming the bottom wall of the socket-like bore I64 into which the. lower end of the. plunger 45 is seated, and. with, otherwise fixed stroke ofup. and down movement. of) the. carrier I63; as. by the lever I5I and cam I41"(Fi'g.- ure. .1), the plunger 45 may be raised. or lowered. relative to. the carrier H53, by adjusting the screw I-G'I which may be looked as by'the 1001 m I68,

mandrel 39 is under-cut. by way of each pin may be dependably pressed or forced into the above-described anchoring relationship to the material forming the walls of its hole H in the sleeve 20, and moreover, each one of thenumerous pins becomes positioned at exactly the same distance from the axis of the sleeve 20- so that the centers: of mass of all of the pins are equidistant from that axis and with equal space: ingabout the circumference of the sleeve 20, nicety of dynamic balance results. r i

In Figures 1 and 5, the drill 46 is shown in its; lowermost position and the plunger is shown in its uppermost position, the drill controlling cam' I11 having its highest point in engagement with the cam roller I78 and the cam I41 having its highest point in engagement with the cam" roller I48, it being noted that asv t'e plunger moves from the position shown in Figure 7 to that shown in Figure 5, throat elements BI and" 82 are displaced in' counterclockwise and clockwise dithus-permitting accurate. fixing of the upper lim it. of movement of the. upper end, face of the plunger 45. Thus, though the. holes due tosuch factorsas the helical grooves 39 extend: all sleeve, the I the way through the wall of the, plungermay be set to force the. pins homeinto with. their dence with the inner face of the sleeve-or falling interfere with, slipping the sleeve. element others onto;

with. the. removal of. the I that particular helix or row' 'mentof cam l channel IOI' to'the' thus-preparing for the release by gate I36 of the rections, respectively, by the action ofthe plunger 45 itself, the bias of the throat elements urging and holding them against the sides of the plunger 45, as shown in Figure 5, and biasing and moving them back into the positions shown in Figure 7-" as the plunger recedes or moves downwardly fromthe position of Figure 5- to that of Figure 7.

Duringthe upward stroke of plunger 45, the drill 46 is given a. steady downward stroke, and the mandrel 39 and hence sleeve 20 are held irrfixed position with a previously drilled hole of presented to and fixedly held in Iinewith the upwardly moving pin carried by the plunger, the commencing the drilling operation to provideahole in advance, and as the plunger recedes" 1 and hence moves downwardly as a result of move- I41 in counterclockwise direction.

from the position shown in Figure: 1, it being noted that the weight of the plunger 45, carrier I-63 and lever IS I-insure biasing of the cam follower always into engagement with the cam: I47; cam II'E (Figures 1 and 5") continues to hold gate- I'35 closed, the cam follower I'-I 8- thereof being still on a low ing opened the gate I35 (Figures 5 and 6 shortly aftercam I IB'has closed the gate I 36, such closure having taken place s ortly' after release of a single pin while the plunger 45 is in its lowermost position, now moves the gate I35 inclosing position, thus to: hold back the row of' pinsP in the right of the gate I 35; and

single. pin held by the left of gate I35. I V I Following the withdrawal 'upwardly 01' the drill 46 and downwardly of plunger 45 1mmthe point' latter in advance orto thed'rill mean-while part of the cam, while cam I' I 1, haved end of a pin just driven home by the plunger, cam (Figures 1, 3 and 4) actuates the ratchet operating bar 61 (Figures 2, 3 and 4) in an upward stroke followed by a retrograde stroke (see the hump in cam 15 of Figure 1 displaced about 90 from the highest point of cam I41), thus to actuate the ratchet 66 to rotate the mandrel 39--40 throughout the angle subtended. by two successive holes H in a row and by the coaction between the threaded block 41 and the threads of part 40 to advance the mandrel slidably along its support 36 by the right amount, locking pawl 66 acting to lock the rotated parts accurately in their newposition. 1

By that time the lowest portion of cam I11 holds the drill in uppermost position and the lowest portion of cam I41, that portion being of about 90 extent and of about the same radius throughout, comes into coaction with the cam follower I48, thus to hold the plunger in its lowermost position as shown in Figure '1, with the throat forming elements 8I-62 restored to coacting relation with the pin receiving socket 81 in the plunger, and just about when theplunger arrives at'its lowermost position, a high portion of cam II6 rides the cam follower II6 upwardly to lift the gate I36, thus releasing the single pin that had been isolated between the two gates I35 and I36, that pin quickly moving down the channelextension I21 to be enteredinto the plunger recess 81 as was above described. 7

Then the gradually rising portion in the upper left-hand quadrant, as viewed in Figure 1, of cam I41, comesinto action uponcam roller I48, progressively and steadily forcing the plunger to the uppermost extreme of its upward stroke to seat and embed the pin carried by it in the sleeve 26, but just about when that movement begins or shortly thereafter, cam II 6 closes the gate 136 and shortly aftersuch closure cam II1 opens gate I35 to permit the row of pins in channel IOI to slide downwardly to be stopped by closed gate I36, and shortly thereafter cam II1 closes gate I35 in order thus to place the single pin between it and gate I36 under the sole control of gate I36. A similar gradually rising portion of the cam I11 operates substantially synchronously to steadily bring the drill 46 downwardly to performits drillingoperation. a V

Such sequences of steps to constitute a complete cycle thus take place during a single revolution of main drive shaft 11 and of cam shaft I64, the ratio of driving connection between the two being 1 to 1, whence the cyclerepeats itself in rapid succession, illustratively at a rate to anchor about 60 pins per minute.

' The main drive shaft may be driven in any suitable manner, conveniently by way of an electric motor I1I which may be secured to the underside of base as indicated at I12 in Figure 1, whence a drive chain I13 connects the motor sprocket I14 with a sprocket I15 mounted on the rear end of shaft 11.

Where the holes H in the sleeve member 2E! are to be arranged helically, the operation, after having assembled a blank sleeve, to the mandrel 39, is commenced by first manually setting the structure 394D toward the left of the position shown in Figure l, the drive being halted for that along the supporting shaft 36 and to permit 'positio'ning the mandrel structure in a rotarysense,

locking pawl 60 being yieldably mounted while driving pawl 66 may be disengaged if necessary, to bring that portion of the sleeve 26 where the first hole of a helix is to be drilled directlyunderneath' the drill 46. ,The location or point where the drill will drill the first hole of a helical row ibecomes definitely fixed by the inter-engagement of the thread block 41 with the threads of part 46. t

Next I provide suitable means to prevent or delay pin-setting action by the plunger and related mechanisms until, after the drive has been started, a step by step succession of holes has been drilled by the drill 46 sufficient, being 180 in extent in the described embodiment, to present thev first drilled hole to the locus of operation of the plunger, and thereby also preclude jamming the apparatus as might happen if the plunger were to be forced to attempt to set a pin 6 and 14) to hold it in stopping position until that cycle at which the first drilled hole of the helix is presented to the locus of operation of the plunger.

Preferably, I interrupt the drive of the gate I36, and do this preferably by displacing the cam follower or push rod II8 out of engagement with the gate lever I46, as is better shown in Figure 14, where the aperture I20 in the base 25 and the aperture I22 in the block I24 are shown elongated in a direction toward the left so as to permit the push rod II8 to be tilted in counterclockwise direction from its normal or operating vertical po-. sition to a sufficient extent to bring its upper end, while maintaining its lower end in contact with the cam II6,'sufficiently to the left of the free end of lever I46 so" as to clear the latter durin its up and down strokes of movement, the under end" portion of lever I46 being tapered or camshapedv toinsur re-entry of the upper end of push rod I I8 underneath the lever I46 when the driving connection is to be restoredas is later described. I V t s -About an intermediate portion of push rod H8 is an elongated sleeve 208 pivotally mounted by pin'208'at the lower end of a lever 2H1 that is pivotally'supportedby a screw stud 2I I threaded uprightl93, as by fpin 2I5. If unrestrained, the

tension of spring 2I4 swings lever 2| 0 counterclockwise sufficiently to tilt the push rod H8 in clockwisedirection (Figure 14) to bring its upper endunderneath the gate lever I46, a pin 2I6 projecting from the block I24 being engaged by a lug 210a projecting from lever 2I0 in order to limit the extent of clockwise tilting of push rod II8 to just about its normal or vertical operating position.

Cam. 2I3 is rotatable and movable with the mandrel structure 36-40 and is preferably mounted for adjustment with respect thereto. Preferably, as is better shown in Figures 1, 2, 13 and 14, I utilize collar 42 as a carrier for cam 2I3 and; may, and preferably do,'form the cam 2I3 integral with thejcollar 42, and where elf-fixed relationship of the row or rows of holes in the V asby a slot 39 'in the end portion of the mandrel 39, and where the holes are to be drilled. anithe pins'set in thepattern oi a .mu1 p1.e e x;; h

as thejour above-mentioned helical rows R l', R-.3 and R.'4,,II provide four such slots, namely, slots 39 ,392 39 and 38 andg provide the thubcr icollaruelement, 42 ,of the cam..with an lfl inwardly radially extending key orgproje'ction 2B? (Fignres13 and'14)'-s'et into, afpsuitable reces'siili the end face,ofJthe collaracam structure 42-:1-Zl3 andfixe'dly secured as by a screwill, and. with the. f01ir slots equi angularly spaced, set screw tsla dme key ,2 l3% are spaced 90f apart as shown iii; Figures 14 and ,1 6. 1. .The slots are. openended V }(Figure,=l3,)., andby, loosening set screw 43, the

, dur n h r il cqi ciflr dc i b e ll structure. may be fslippedflonto the. mandrel man axial direction any one of four rotarypositions,

each related to one of the abov'e-mentioned'dei w p sired helical rowsvof holes and pins.

In Figures 12v,-c13. and14, theLpar aresho wn' 'po'sitionedin readiness tofdrill thefirst holeof for .example,,roW R/ I; sleeve 20havingits cut;-

out'lll's (FigureLlZ),interfittedwith the steppfed should'en lllgof themandrelandkey 2I 32 .Ibeing in the-slotjlli with set screw Q43 tightened, up

a ainst the. bottom .of ,slot 39?, and gm that position thefhighperipheral portion Al-"fit cfthe am (the .part rotating in counterclockwise .direc as. seen inri'g re E14 11 its. initial portion" brought into engagement-withthelever 2'lv0v'vvhich isthereby;held sv ning.w clockvvise;against the tentsionpf spring 2'.| 4',.thusp holdin g push rod-1118 out of, engagement withthe gate leverg l t svso thatthe -wand wn s e then mann- ,der the-action of am ll fi -do notrac i r e.il ga orierationofthe pins ettingplungerj l i wordajuntilgthefirst rhole drilled isinposition tohavetheplunger liseta 1 itf accordingly; the highLperipheral-pqrt 1 ,313} 7 A .7 f es ft i ln m r l80, w hence here fis, a Iclro fo f llthe 1carn, that V chang'e rpennittinglleverizIO' to s .wise .ldirection "under "the tension; of spring? I33; The: step by step drilling commences, 'npbn 1 starting'theapparatus, and continues the gate V, V 7 v, l e c h-hol s e r r s nd na t he. i lac ment .in,-.the illustrative embodiment 11 09;; between the +35 remaining closed until :the drill ha locusot operation oflthe drillalidgxthefllocu .pf

pfmthecain 2 cislof that argl i count r lock- 1M, thus.- restor ing push me I'l 8',t o'l its position under+ neaththe gate lever. lAfitwhence-zthe a flcgfi is actuated ,c.being timed'as earlierfabove described .vwiththe other moving parts, totransfersa; Q jithe' throat elementslandto the piungenglsrm; in-" -sertion into that first lh ole, vvhence step-Q drilling, .stepebyastep .pi 'n transien and, :step bystepl-pin-settingi continue in timed relationships, 'as'tearl'ir' above described.

' As earlier above noted; the stepJoy-s t iepj c entf eae a q t nszS uctu e m a i ,iiian dreltstructure 33- 41mm: the sleeve 20, is a the cam Pe ip e 's't epby-stepj rotary. movement the direction gof'the arrows-shown onthe drawings anda' step ally Step in a dirctionltoward the right as v yved vinEigures 1 2 .1

V c i '5 'whei tlth r nin 'whichthe holes ac drilledand pins-are helical, A1; 'Fthencom ncement ,q gt e eration,"thatis, when the first hole is' drilled; the

fpHpiver 2 i 2' of thelever 2] as l 9idr li we .pina hb i i is con-t nue,--the point is;reached whretheilast ole of gthehelixjpf hgles is to be drilled and at" that point I provide suitable nieans ffor preven further drilling opera-oop b'y tl1e" el'rill, lfeavif1 the rest of the inechan m to continue s as'to conclude the 's'etting -o pins in the 180 gig-tent of holes that woulcla tu of the locus of operation-of th pl unger =A "siinpleand convenientway for effectiiigsuch cess tion of thegdrilli'rig operation in -advance ty l-) ofstdpping tfi pin-setting operation-,1 the latter-being [accomplished preferably by topping the drive ofthev entire'apparatusgconiprises pro}- fvisi ons for interriipting the working strokes-bf the drill, conveniently by shifting the push-rod I'B2 'E7igure 1)}, at its lower end, t'o the right and thus disengagingit from the lever [8L5 I hus/ the boss I 83 and the base 25 have "a {longitudinally extending slot 218- so that tli lowerenfdofthle push rod may be meved tg 'the right in Figure. 1

a' pivot, and such "movement;- and subsequent 'res toration into coasting i-{ela'gtior with the lfever $81 may lie-achieved as by a' y'oke 2 I9 i ures 1 -2, 13

' of the'bas'e 25-.

rhumn yoke z ag ettvee the a ring of than pus-h rod I'82----passes' (Figure lfl, rests s1" ably {against the upper-race of "the boss I83; 'and isguided for"moveinentdnHie-direction flthe slot 2 [8 by a stud or-rod"22 '0' slidably moanted in an upstanding boss 22 l formed in op; secured-'to thebase 25; atitsright-hand end the rod 22)) as secured to it"a collar "2'22 and etweemne -c'o11ar and the "fixed-boss 22 l i's a 'coil s prirlg';2'2'3 :iilhi'ch normally biases the cke 24 9; in a flir ecti 7 Ward the; right' 'asiviewed in Fi'gii-res 12 an 13;

As is better' shown in'Fiuifesifand aeravid a latch ar n Z24 for coactionfwith -the oljlar zgz, latch arm "2 2.4 te -fig pivotally siibnfted by pin :25 mountedgm :a' bi ackjetj ifi securdajs by screws 221150 the-franiellpright 93.

' h'the push rod l- 82 in enga a at hemp remain inaav nee e wi ii res sei to "and -pin set.

permitted by the free end portion of the rod 220; (as is better shown in Figure 16); thereby yoke 2 I9 is held in position tomaintain the lower end of push rod I82 in alignment with th recess IIlI of the lever I8l, the push rod I82 partaking of up and down strokes in response to the actuation of lever I8I from the cam I'I'I whose lowest portion, that is, the portion of smallest radius, is preferably such that it permits the free endof the lever vl8l to assume a lowermost position to unseat the push rod I82 from the seat IBI though re-seating takes place upon ach upstroke of the lever I8| so long as the yoke 2I9 is held in the above-mentioned position as shown in Figure 12.

In positioning the latch lever 224 as above described (see Figure 16) a laterally projecting portion 224 of the latch lever 224 is given a position substantially like that shown in Figure 16, being substantially in the helical path of movement of a projecting portion 2I3 of the cam 2| 3,'relat ed to the other portions substantially as shown in Figure16.

As the above-mentioned'cycles of drilling, Pin transferring and pin-setting are repeated, and as the drill 4B approaches the point in the stepby-step rotary and axial movement of the mandrel and hence of the cam 2I3 where it is about to drill the last hole of the selected helical row of holes, the cam structure 2I3 reaches an axial position corresponding almost to its extreme right-hand position and hence into coacting relation to'the cam follower portion 224 of the latch lever 224, the last hole is drilled, whence the next step of rotary movement of the mandrel structure-and hence of the cam 2I3, being in counterclockwise direction as viewed in Figure 16, causes the cam part 2I3 to engage the latch lever part 224 and trip or swing the latch lever 224 in clockwise direction and hence out of engagement with the collar 222, thus releasing spring 223 to move the yoke 2I9 toward the right as viewed in Figure 12 and from the position shown in 'Figure 13 to the position shown in Figure 15;'this action occurs duringthose portions of a cycle that find the lever I8I (Figure 12) in lowermost position in which the lower end of push rod I82 is out of en-' gagement with the seat I8I of the lever, thus giving the spring 223 complete freedom to swing the push rod I82 to the right and into the dotted line position shown in Fig. 12', the subsequent upstrokes of the lever I8 I being thereby ineffective to give the push rod I82 and hence the drill any working strokes.

The drilling operations are h'alted and the drill remains in uppermost or out-of-the-way position, whence the setting of pins in the *still empty holes (of about 180 extent) continues, the drive of the apparatus being stopped when the last pin is set.

' If the sleeve member is to have more than one helix of pins, as was abov initially assumed,

after disengaging the thread block 47 from the thread part 40 to axially and rotatably reset the 1 mandrel and the sleeve 20 to the starting point for the second helix of holes, and then re-engaging the thread block, and resetting the rotary position of cam 2| 3 and its carrier collar 42 by bringing the key 2I3 into one of the mandrel slots corresponding to the next helix and then setting thelock screw 43, as above described, but

the second helix to b drilled Thus, if there are four helixe's of holes to be drilled and fitted withpins, the. four helixes startat equi-angularly spaced points and hence at points spaced from each other, and accordingly the mandrel part 39 has the above mentioned four slots 39, 39, 39 and 39 similarly spaced equiangularly and hence by 90, and thereby the cam structure 42-2I3 canbe set in four different angular relationships, one for each helix.

Each such setting of the cam structure insures that, for'each helical row, drilling commences at the right point, pin-setting is delayed u'ntil'the space differential between the locus of operation of the drill and locus of operation of the'pin setting plunger is compensated for by the drilling of holes (illustratively, throughout in the embodiment above described, and that drilling ceases at the right point to terminate each helix at the right point, While permitting continued pin-setting operations after the last hole has been drilled, whence the apparatus maybe stopped, as by opening the circuit of the driving motor by means of any suitable switch, *(hot shown). Accordingly, with the cam structure once set for a particular helix,-and the apparatus is started, it continues to function without'atten tion until the last pin is set whence it is stopped as it has to be in order to re-set the cam 2I3, or to replace the sleeve member 20 by another.v Thus dependable uniformity of construction:

throughout all of the pin-set sleeve elements can.

be achieved. a

i As the supply of pins in themagazine struoture 89 diminishes, more are added thereto and, upon completion of assembly of pins to a sleeve member 20 carried by the mandrel 39, the ap-- paratus is stopped, collar 42 of the mandrel 39 is released and thesupporting standard 28 relmoved, whence the completed picker roll section is removed from mandrel39 and another sleeve'20 slipped onto the mandrel 39 whence the collar, 42 and the standard 28 are replaced, the new sleeve member 20 being properly fixed in position-by the interlocking of its left-hand end portion (Figure 1) with the annular steppedshoulder dl,

With the sleeve element 20 and thepins Prof materials or relative proportions as earlier'above described, the resistance to entry of the pins into their respective holes in the'hollow cylindrical or sleeve element 20 may be substantial, butthe drive of the plunger 45 takes place under adequate force or pressure to force-fit the pins, whether the latter arethreaded or not,"and;ide:- pendably anchor them into the sleeve element,

and where threaded pins are employed, such as I or pressures which it exerts, the rotary movement of the pin in cutting its own thread is transmitted to the plunger with so little resistance that damage or distortion to the fin-like cutting threads on the pin or to the threadswhich it cuts into the wallsof the hole is minimized or guarded against.

Thus it will be seen that there hasbeen provided in this invention an apparatus infwhich the several objects hereinabove set forth together with many thoroughlypractical advantages are "successfully; achieved. The apparatuses offdependalole action-and capable-of high speedfsynchronized hole-drilling and fof -a ssembl-y; with good anchora e, "0f the large number of gains {to each sleeve element; and-is capable of ready-and facile; control. Also uniformity'of. distribution of the pins is assured, thus making for n-icety of dynamic-balance, each -pin being anchored- 01 'fixed at the same distance from theaxisaoj. the

sleeve element. J ,Also the apparatus is capable of' exerting; eve n thoug h operating at substantial speed the relatively largeiorces or pressures appropriate "to achieve the desired embedding -or anchoring of the pin shanks in the material of the sleeve element, V V

' many possible embodiments may be made of, the, aboveinvention and as many changes zmight be made in "the embodiment above set forth, -it,-is to be understoodthat all matter here inbefore set forth or-shownin the accompanying drawings is to be interpreted as illustrative and n tir-rali-mitingsense.

fI-claim: 7

1. ;An' apparatus; for 'drilling holesin a support and for setting; pins therein, saidapparatus comprising means for 'movea-bly supporting'the-support =moveable drill means, a moveable element for carrymg a-pin and---forcing it into a-holein the support, mechanism-forefiecting steploy'step movement of saidsupport-and operating during ,pauses'in-the movement to actuate'said: pin-forcing element to seat a pin in a hole in said-support and to: actuate" said drillmeans to drill 'a hole therein- "at fa point-in advance of *the-VpointF of opefationof said pin -forcingelementyandimeans o operating in timed relation to-said mechanism foriprecluding pin-forcing operation Joy said'el'emerit uhtilsufiicierit holes-have teen: drilled by saidfiriil: -means *for *said support toipresen't iiled'hole'to saidelement 2. apparatus for" drillingholes in a support andifor' setting pins I therein, said apparatu's 'c'om prisingl 'means for i moveably supporting the support, moveable drill" means, a move'ab'leelement VfcS'r cai'rying -a pin "and forcing it into ahole' 'in the support: mechanism-for effecting stepfby, jstep srnovement -of saidsupport' and operating d'uiiina'pauses in "the movement to "actuate -said :pizi forcing" element to seat a pin in "a hole insaid support and to" actuate "said: drill means to drill 'a-lrole therein "at a pointi-inggdfiance bf therpoint o'foperation of "said pin=forcing element andisaid mechanism includin'g; means operating i'Wtimed :relation- 'to said 'step" by stepmovement f :for 'feedifigpihsto said element,and*'mearis toper ating imtimed'relation tosaid'stepstep movemerit for" delaying pin-feeding actuation by said lastmentioned means until said drill means has "drilleid'sufiicient holes-to present the-leading-hole -ifosaid-pin-forcing element.

apparatus for. 'drill-ingeholes =in -asupsportandffor setting-pins therein, said apparatus -'comprisi=ng-*meansr for-moveab-ly supporting the H supportjmoveabledrill means a moveable 'element fer carrying a pint and forcing it-into a-V-hole in #the: support, 'n'iecl'ia-nism -for-eiiectihg step by step-movement ofi'said supportandoperating'during pauses in the movement to; actuate said? pinforcing elementto' seat i a pin; in a hoie' in said supportand to-actuate said 'drill means to drill a hole therein at a point in advance of the point operating; -t'ii-ned relation to; said nmf assays-7 mentioned gmechanism ier effecting -transfer 0;

pins-from-said supply means "to said pin-forcing e1ement, and control means far said; secondmentioned; mechanism forpreventing-transfer of pinsto said element for as manystepqby step 7 movements of said first-mentioned mechanism-as areneeded to present the-first drilled hole. to said-pin-forcingelement, 5

- 4-. An apparatus :for -drilling; holes in a -suppor t and for setting ipins therein, said apparatus? com prising means for moveably supporting the support, moveabledrill means a moveable. element for carrying a pin and. forcing it into-ahole in the sli-pport,;mechanism=iforefiecting-step hy'step "movement of said support and operating during tin 'pins insaid holesfsai d-apparatus compris- 1 ing a mandrel-tor supporting saidfhollow cylindrical support, said mandrel being undercut externally to provide space for' accommodating the end of. a sen-arm completing the drilling ofa hole through said support, 'drill means, a .,pin-- 'forcing element, me chanism foro effecting step by step" movement of mammal-e1 andcsaidt support relative to said drill -me'ans and anne em with the former l positioned." inadvancef of the latterfi mechanism operating during-thepauses in said. step by-step mandrl movementiforactuat ingj said drillmans todrill ahole' through the 1 support wall and to enter the drillwin'said' space to insure complete drilling of the holega-nd mechanism "operating during aid pauses to actuate said element inpin forci'ng .directionto thefsame 'esnem'at each pafu'sei to force pins' -iiito thelirllled holes," ene'zpm ror eac-hholeg-andteach pin to- 'the same distance from the iFaXis of V-sai'dT hollow suppen 7' 7 "6. n apparatusjror drilling holes throughithe Wall "ffiajl'iollow cylindrical supportfand 'ifor set- 7 tin JinIsa-id. holes saidf appa atus' jcomprisi almandrel to? reteivesatid. cylindricaL support "the recess1 du figi'p 'factu'te thereon, saidnianurei being? reCSsdltdLDriotid space for I accommodating the emerging endof a;idrnrumlir g,tnrotghthei.wanforj saidilsnppont 'afidithreBYJeaVir-ig intervening surface portions ofthe i-manarn to give internal support to said 'hdliew eynndncar support, drill mea ns means mountin aid7dri1l means; and 'said'inandrellfoi' relative step by step-movement along the line of 'in'said mandi ellmeans operating in saidfst'ep' 53f step mbvememlto $9.16. dllII means to 211111: afhbleatf eah pause throug lifle wan of 'said'ffibllow sup ort and; t.o"fnter the drillintogsaid space: toeinsure complete drilling of 'fthelhole, and pinaforcing "mes-narratin mechanism actuating it. in timed f reIatibn tHereto vinpin-forcingdirectionliogthe s'aidtsii prn sam ex-tentat each: pauseto .7 force pins -i nto said ho1es, .one at .each =pause,-and- ,eac h tosthe same sspacing of ,its inner end "from [the -axis t n-ap atusat ending-1ha esga tgh ne wa for a hollow cylindrical support and forzsetting pins therein, said apparatus comprising a mandrel for receiving said support thereover, said mandrel having a plurality of helical grooves to provide spaces for accommodating the emerging end of a drill drilling through the wall of said support and to provide intervening helical rib elements to back up said wall, drill means, a pini'orcing element, means mounting said mandrel and said drill means and element to effect relative step by step movement therebetween along the line of a helix having the pitch of said helixes and with said drill means in advance of said element, means for selectively determining along the line of which of said plurality of helixes said relative step by step movement is to take place, means operable during pauses in said movement to actuate said drill means to drill a hole through said wall whereby the emerging drill end is always accommodated in the selected helical groove, and means operable during pauses in said relative movement to actuate said element to forcea pin into a drilled hole. I

8. An apparatus for'drilling holes in a cylindrical support and for setting pins therein, said apparatus comprising means for supporting said support, drill means, a pin-forcing element, means mounting said supporting means and said drill means and said pin-forcing element to efiect relative step by step movement therebetween along any one of several helical lines, means for selectively determining along which of said several helical lines said relative step by step movement is to take place, means operable during pauses in said movement to actuate said drill means to drill a hole in the cylindrical support supported by said supportin means whereby a helical row of holes may be drilled in said support, and means operable during pauses in said relative movement to actuate said pin-forcing element to force a pin into a drilled holes 9. An apparatus for drilling holes in a cylin drical support and for setting pins therein, said apparatus comprising means for supporting said support, drill means, a pin-forcing element, means mounting said supporting means and said drill means and said pin-forcing element to effect relative step by step movement therebetween along any of several helical lines and including a multiple-threaded element and a nut element having means mounting them for'relative movement into and out of engaging relation for thereby selectively making effective any one of the threads of saidmultiple-threaded element and thereby determining along which of said several helical lines said relative step :by step movement is to take place, means operable during pauses in said step by step movement to actuate said drill means to drill a hole in said cylindrical support whereby a helical row of holes may be drilled therein, and means operable during pauses in said relative movement to actuate said pini'orcing element to force a pin into a drilled hole thereby to assemble Ia helical row of pins to said support.

10. An apparatus for drilling holes in rows in a cylindrical support and for setting pins in the holes, said apparatus comprising means for supporting said cylindrical support, drill means, pinf orcing means, means mounting said supporting means and said drill means and pin-forcing means for relative step by step movement along the line of the desired row of pins to be efiected and with said drill means in advance of said pin-forcing means, means operable during a pause in said step by step movement for actuating said drill means to drill a hole in said support; means operable during a pause in said step by step movement to actuate said pin-forcing means to force a pin into a hole in said support, and means actuating said two last-mentioned operable means in timed relation to said step by step movement each in a sequence of as many steps as correspond to the number of pins to be set in a row on said support, but with the commencement of the sequence effected by said pinforcing means delayed to correspond to th number of steps that said drill means is in advance of said pin-forcing means. v

11. An apparatus for drilling holes in rowsin a cylindrical support and for setting pins inthe holes, said apparatus comprising means for supporting said cylindricalsupport, drill means, pinforcing means, means mounting saidsupporting means and said drill means and pin-forcing means for relative step by step'movement, along the line of the desired row of pins to be effected and with said drill means in advanceof said pin-forcing means, means operable during a pause insaid step by step movementfor actuating said drill means to drill a holein said support, means operable during a pause in said step by step movement to actuate said pin-forcing means to force a pin into a hole in said/support, and means for holding said pin-forcing means ineifective atthe commencementof said step by step movement for as many steps in the latter as correspond to the'number of steps that said drill means is in advance of said pin-forcing means. 1 i 1 12'. An apparatus for drilling holes'in rowsin acylindrical support and for setting pins in the holes, said apparatus'comprising means for supporting said cylindrical support, drillmeans, pinforcing means, means mounting said supporting means and said drill means and pin-forcing means for relative step by step movement along the line of the desired row of pins to be 'efiected and with said drill means in advance of said pinforcing means, means operable during a pause in said step by step movement for actuating said drill means to drill a hole in said supportmeahs operable during a pause in said step by step movement to actuate said pin-forcing'means to force a pin into a hole in said support; andmeans for halting the actuation of said drill means after it drills the last hole of a row while permitting continued actuation of said pin-forcing means to set pins in theholes that. remain in advance o1 said pin-forcing means. I

13. An apparatus for drilling holes'in rows in a cylindrical support and for setting pins in the holes, said apparatus comprising meansfor supporting said cylindrical support, drillmeans, pinforcing means, means mounting said supporting means and said drill means and pin-forcing means for relative step by step movement. along the line of the desired row of pins to be effected and with said drill means in advance of said pin forcing means, means. operating in timed relation to said step by step movement for actuating said drill means to drill 'a hole during each pause in said movement, and means operating in timed relation to said step by step movement to actuate said pin-forcing means to forc a pin into a hole during each pause, means for holding a plurality of pins with means operating in timed relation to said step by step movement and including a gate member for effecting transfer of a pin to said pin-forcing means once for each step ofsaid 

